"Graham is an exceptional professional in all that he does. His work is at the crossroads of business intelligence, finance and investments and sustainability. His ability to clarify objectives and execute on solutions has demonstrated the fruitful success of the business case for sustainability." Director and Senior Investment Analyst, global institutional asset manager, New York City.

"I met Graham in its role as project director for the PRI. Graham is focused on his objectives and extremely professional. I look forward to work with him again." Managing Director, hedge fund, Geneva..

"Graham is a bright, talented and knowledgeable individual. His passion and enthusiasm for the UN PRI work was inspiring. Graham is results-oriented and an effective communicator. It was a pleasure working with him." Director, US-based asset consulting firm, Connecticut.